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Old 17th October 2012, 06:28 PM   #541
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resistance in R4 is drifting and not stable
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Old 17th October 2012, 06:28 PM   #542
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yes. all that is spot on.
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Old 17th October 2012, 06:30 PM   #543
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hmmm. it drifts even when you dont turn the pot?
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Old 17th October 2012, 08:20 PM   #544
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yes it does
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Old 17th October 2012, 08:30 PM   #545
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thats not right.
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Old 17th October 2012, 08:41 PM   #546
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I've checked with two meters- its keep going up (resistance of R4)
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Old 17th October 2012, 08:44 PM   #547
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do you use the 4.7K thermistors?
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Old 17th October 2012, 08:48 PM   #548
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yes I do
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Old 17th October 2012, 09:17 PM   #549
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and they have good contact with the fets?
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Old 20th October 2012, 03:57 PM   #550
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had a chance to check only now
one leg of Q2 does contact one leg of TH2

Anything else I can check?
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